Recovery of heavy metals from industrial sludge using various acid extraction approaches.

摘要: Heavy metals were removed from industrial sludge by traditional and microwave-assisted acid extraction approaches. The effects of concentration, time, particle size solid/liquid (S/L) ratio on copper-extraction efficiency assessed. Leaching with increased concentrations the yield heavy sludge. In extraction, reducing S/L efficiency. These experimental findings indicate that most strongly influenced extraction. Both demonstrate sulfuric was an effective extractant, copper fraction in extracted shifted being primarily bound to Fe–Mn oxides organic-matter partition, mostly organic matter, remaining as a residue during